The Ottevanger’s crumblers technology is based on two large, independently driven rollers. That ensures an optimum result of minimum fines with maximum crumble. An integrated control valve ensures an even flow to an axially riffled proportioning roller, manufactured from solid steel.

Large-scale axially and radially riffled crumble rollers rotate slowly, at different speeds in opposite directions, and cut the pellet to a crumble. Using accurate remote measurement, the large 300mm crumble rollers guarantee an optimum result. Automatic roller adjustment increases the efficiency and simplifies the adjustment of the roller during production.


  • Housing manufactured from mild steel
  • Manual or automatic feed valve
  • Solid-steel proportioning roller with axial riffles
  • Two solid-steel 300 mm axially and radially riffled crumble roller
    from chrome steel or hartguss
  • Rollers independently driven and at different speeds
  • Transmission via V-belts
  • Accurate adjustment of crumble size
  • Manual or automatic roller adjustment
  • Analogue read-outs accurate to 0,1 mm
  • Safety provision via disk springs against foreign objects
  • Heavy duty, closed shaft bearings outside the housing
  • Inspection hatch with safety switch

Range of single Crumblers

Type single Capacity(tph)
HBU KRU 3 10
HBU KRU 4 13
HBU KRU 5 16
HBU KRU 6 20
HBU KRU 7 23

Range of twin Crumblers

Type twin Capacity(tph)
HBU KRU 4 25
HBU KRU 5 30
HBU KRU 6 38